Hire the Best DevExpress Developers

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Hafiz Muhammad A.

Lahore, Pakistan

$50/hr
5.0
8 jobs

โญ ๐—ง๐—ผ๐—ฝ ๐—ฅ๐—ฎ๐˜๐—ฒ๐—ฑ ๐—ง๐—ฎ๐—น๐—ฒ๐—ป๐˜ ๐—ผ๐—ป ๐—จ๐—ฝ๐˜„๐—ผ๐—ฟ๐—ธ โœ… ๐Ÿญ๐Ÿญ+ ๐˜†๐—ฒ๐—ฎ๐—ฟ๐˜€ ๐—ผ๐—ณ ๐—ฝ๐—ฟ๐—ผ๐—ณ๐—ฒ๐˜€๐˜€๐—ถ๐—ผ๐—ป๐—ฎ๐—น ๐—ฒ๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ โœ… ๐Ÿฑ๐Ÿฑ+ ๐˜€๐˜‚๐—ฐ๐—ฐ๐—ฒ๐˜€๐˜€๐—ณ๐˜‚๐—น ๐—ฝ๐—ฟ๐—ผ๐—ท๐—ฒ๐—ฐ๐˜๐˜€ ๐—ฑ๐—ฒ๐—น๐—ถ๐˜ƒ๐—ฒ๐—ฟ๐—ฒ๐—ฑ (Upwork + direct clients) โœ… ๐—ง๐—ฟ๐˜‚๐˜€๐˜๐—ฒ๐—ฑ ๐—ฏ๐˜† ๐—ถ๐—ป๐˜๐—ฒ๐—ฟ๐—ป๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐—ฎ๐—น ๐—ฐ๐—น๐—ถ๐—ฒ๐—ป๐˜๐˜€ ๐—ฎ๐—ฐ๐—ฟ๐—ผ๐˜€๐˜€ ๐˜๐—ต๐—ฒ ๐—จ๐—ฆ๐—”, ๐—จ๐—ž, ๐—ฎ๐—ป๐—ฑ ๐—–๐—ฎ๐—ป๐—ฎ๐—ฑ๐—ฎ Are you looking for a reliable .NET developer to build scalable web applications or high-performance APIs? Iโ€™m a ๐—ฆ๐—ฒ๐—ป๐—ถ๐—ผ๐—ฟ ๐—™๐˜‚๐—น๐—น ๐—ฆ๐˜๐—ฎ๐—ฐ๐—ธ .๐—ก๐—˜๐—ง ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—ฒ๐—ฟ with 11+ years of experience building enterprise web systems, SaaS platforms, RESTful APIs, and cloud-ready applications using modern Microsoft technologies. I specialize in turning complex business requirements into secure, scalable, and maintainable software solutions. ๐—ง๐—˜๐—–๐—›๐—ก๐—œ๐—–๐—”๐—Ÿ ๐—˜๐—ซ๐—ฃ๐—˜๐—ฅ๐—ง๐—œ๐—ฆ๐—˜ ๐—–๐—น๐—ผ๐˜‚๐—ฑ & ๐—”๐˜‡๐˜‚๐—ฟ๐—ฒ Azure App Services, Azure SQL, Azure Functions, Azure SignalR, Azure Storage, Azure Service Bus. ๐—ช๐—ฒ๐—ฏ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ ASP.NET Core, ASP.NET MVC, Web API, JavaScript, TypeScript, React, Next.js, jQuery, Bootstrap, HTML5, CSS3, Material UI ๐—•๐—ฎ๐—ฐ๐—ธ๐—ฒ๐—ป๐—ฑ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ C#, .NET Framework, .NET Core / .NET (3.1โ€“8), Entity Framework, EF Core, Dapper, NHibernate, LINQ, ADO.NET, SQL Server, T-SQL, MySQL. ๐—”๐—ฃ๐—œ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ & ๐—œ๐—ป๐˜๐—ฒ๐—ด๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€ REST APIs, OAuth, Identity Server, DocuSign, Mandrill, Authorize.NET, HelloSign, Google Place API, Google Contact API. ๐—”๐—ฟ๐—ฐ๐—ต๐—ถ๐˜๐—ฒ๐—ฐ๐˜๐˜‚๐—ฟ๐—ฒ & ๐—ฃ๐—ฟ๐—ฎ๐—ฐ๐˜๐—ถ๐—ฐ๐—ฒ๐˜€ Microservices, Clean Architecture, OOP, SOLID Principles, Monolithic Architecture, Asynchronous Programming, TDD Development. ๐——๐—ฒ๐˜ƒ๐—ข๐—ฝ๐˜€ & ๐—ง๐—ผ๐—ผ๐—น๐˜€ Git (GitHub, Bitbucket, GitLab), TFS , Azure DevOps, CI/CD Pipelines (Classic & YAML), Postman, Open API, Fiddler, Visual Studio (2008 - 2026), Visual Studio Code, JetBrains, RedGate Profilers, SVN, Atlassian. ๐—ฅ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜๐—ถ๐—ป๐—ด SSRS, RDLC, SAP Crystal Reports, Telerik Reporting, DevExpress Reporting ๐——๐—ฒ๐˜€๐—ธ๐˜๐—ผ๐—ฝ & ๐—Ÿ๐—ฒ๐—ด๐—ฎ๐—ฐ๐˜† ๐—ฆ๐˜†๐˜€๐˜๐—ฒ๐—บ๐˜€ .NET WinForms, ASP.NET WebForms, Telerik UI, DevExpress ๐—ก๐—ข๐—ง๐—”๐—•๐—Ÿ๐—˜ ๐—ฃ๐—ฅ๐—ข๐—๐—˜๐—–๐—ง ๐—›๐—œ๐—š๐—›๐—Ÿ๐—œ๐—š๐—›๐—ง๐—ฆ ๐—˜๐—ป๐˜๐—ฒ๐—ฟ๐—ฝ๐—ฟ๐—ถ๐˜€๐—ฒ ๐—ฆ๐—ฎ๐—ฎ๐—ฆ ๐—ฃ๐—น๐—ฎ๐˜๐—ณ๐—ผ๐—ฟ๐—บ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ Built a scalable SaaS solution using ASP.NET Core, EF Core, and Azure Cloud, enabling multi-tenant architecture with role-based access control. Integrated RESTful APIs (DocuSign, Google Place API) to automate workflows, reducing manual tasks by 40%. โ€ข ๐—”๐˜‡๐˜‚๐—ฟ๐—ฒ ๐——๐—ฒ๐˜ƒ๐—ข๐—ฝ๐˜€ ๐—–๐—œ/๐—–๐—— ๐—ฃ๐—ถ๐—ฝ๐—ฒ๐—น๐—ถ๐—ป๐—ฒ ๐—ข๐—ฝ๐˜๐—ถ๐—บ๐—ถ๐˜‡๐—ฎ๐˜๐—ถ๐—ผ๐—ป Implemented YAML-based CI/CD pipelines for a high-traffic web application, reducing deployment time by 30% and improving release reliability. Used Azure App Services, Azure SQL, and Azure Key-Vault for secure, automated deployments. โ€ข ๐—Ÿ๐—ฒ๐—ด๐—ฎ๐—ฐ๐˜† ๐—ฆ๐˜†๐˜€๐˜๐—ฒ๐—บ ๐— ๐—ผ๐—ฑ๐—ฒ๐—ฟ๐—ป๐—ถ๐˜‡๐—ฎ๐˜๐—ถ๐—ผ๐—ป Migrated a monolithic .NET Framework application to .NET 8, adopting Clean Architecture and Microservices. Improved performance by 50% and reduced maintenance costs. โ€ข ๐—–๐˜‚๐˜€๐˜๐—ผ๐—บ ๐—ฅ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜๐—ถ๐—ป๐—ด ๐——๐—ฎ๐˜€๐—ต๐—ฏ๐—ผ๐—ฎ๐—ฟ๐—ฑ ๐˜„๐—ถ๐˜๐—ต ๐—ง๐—ฒ๐—น๐—ฒ๐—ฟ๐—ถ๐—ธ & ๐——๐—ฒ๐˜ƒ๐—˜๐˜…๐—ฝ๐—ฟ๐—ฒ๐˜€๐˜€ Created interactive dashboards with Telerik & DevExpress, integrating SSRS for real-time data visualization. Enabled dynamic report generation with export functionality. โ€ข ๐—–๐—ฟ๐—ผ๐˜€๐˜€-๐—ฃ๐—น๐—ฎ๐˜๐—ณ๐—ผ๐—ฟ๐—บ ๐——๐—ฒ๐˜€๐—ธ๐˜๐—ผ๐—ฝ & ๐—ช๐—ฒ๐—ฏ ๐—™๐—ผ๐—ฟ๐—บ๐˜€ ๐—”๐—ฝ๐—ฝ๐—น๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป Built a hybrid solution using .NET WinForms and ASP.NET WebForms for a logistics client, integrating Telerik / DevExpress controls to improved performance and consistent design, improving efficiency by 25%. โ€ข ๐—ฆ๐—ฆ๐—ข ๐—œ๐—บ๐—ฝ๐—น๐—ฒ๐—บ๐—ฒ๐—ป๐˜๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐—ณ๐—ผ๐—ฟ ๐—˜๐—ป๐˜๐—ฒ๐—ฟ๐—ฝ๐—ฟ๐—ถ๐˜€๐—ฒ ๐—–๐—น๐—ถ๐—ฒ๐—ป๐˜๐˜€ Delivered Single Sign-On solutions using Identity Server (3,4) / Keycloak, ensuring secure, seamless authentication across platforms. I focus on delivering high-quality, scalable, and secure solutions while maintaining clear communication and reliable delivery. If you need assistance with ASP.NET Core, Web APIs, SaaS platforms, or Azure-based applications, feel free to send me a messageโ€”Iโ€™d love to discuss your project. ๐—–๐—ผ๐—ฟ๐—ฒ ๐—ง๐—ฒ๐—ฐ๐—ต๐—ป๐—ผ๐—น๐—ผ๐—ด๐—ถ๐—ฒ๐˜€: ASP.NET Core | .NET | C# | ASP.NET MVC | Web API | REST API | React | SQL Server | Entity Framework | Dapper | NHibernate | Azure | SaaS Development | Microservices | Clean Architecture | Telerik | Kendo UI | DevExpress

  • DevExpress
  • ASP.NET Core
  • C#
  • .NET Core
  • Web API
  • RESTful API
  • React
  • SQL
  • Entity Framework
  • ASP.NET MVC
  • JavaScript
  • Microservice
  • Telerik
  • Microsoft Azure
  • Git
Faz H.

Lahore Cantt, Pakistan

$8/hr
5.0
40 jobs

๐ŸŽ๐—œ ๐˜„๐—ถ๐—น๐—น ๐—ฝ๐—ฟ๐—ผ๐˜ƒ๐—ถ๐—ฑ๐—ฒ ๐—ฎ ๐—ฐ๐—น๐—ฒ๐—ฎ๐—ฟ ๐—ฏ๐˜‚๐—ด ๐—ฟ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜ + ๐˜๐—ฒ๐˜€๐˜ ๐˜€๐˜‚๐—บ๐—บ๐—ฎ๐—ฟ๐˜† ๐˜„๐—ถ๐˜๐—ต ๐˜€๐—ฐ๐—ฟ๐—ฒ๐—ฒ๐—ป๐˜€๐—ต๐—ผ๐˜๐˜€/๐˜ƒ๐—ถ๐—ฑ๐—ฒ๐—ผ ๐—ฎ๐˜ ๐—ป๐—ผ ๐—ฒ๐˜…๐˜๐—ฟ๐—ฎ ๐—ฐ๐—ผ๐˜€๐˜. Most clients come to me because their app has hidden bugs, poor user experience, or last-minute issues before release. These problems cause bad reviews, user drop-offs, and lost revenue. I help you find bugs before users do. I test your web or mobile app deeply, report issues clearly, and work closely with your team to make sure your product is stable, fast, and user-friendly. I focus on quality, clarity, and resultsโ€”so you can launch with confidence. โžค ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐˜๐—ถ๐˜€๐—ฒ๐˜€ โœ… Manual Testing (Web & Mobile) โœ… Automation Testing (Cypress, Appium, Selenium) โœ… Functional & Regression Testing โœ… API Testing (Postman) โœ… Exploratory & UAT Testing โœ… Performance & Load Testing โžค ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐˜€ โœ… Test Case Writing & Execution โœ… Bug Reporting (Clear & Detailed) โœ… Agile / Scrum QA Process โœ… Cross-Browser & Cross-Device Testing โœ… Black Box Testing โœ… CI/CD QA Support โžค ๐—ฆ๐—ฒ๐—ฟ๐˜ƒ๐—ถ๐—ฐ๐—ฒ๐˜€ โœ… Web Application Testing โœ… iOS & Android App Testing โœ… Automation Test Scripts โœ… Regression Test Cycles โœ… API Testing & Validation โœ… Pre-Release QA & Smoke Testing โžค ๐—ช๐—ผ๐—ฟ๐—ธ๐—ถ๐—ป๐—ด ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ โœ… 5+ Years Professional QA Experience โœ… 100% Job Success on Upwork โœ… Top Rated Plus Freelancer โœ… 4,000+ QA Hours Completed โœ… Long-term & Short-term Projects โžค ๐—œ๐—ป๐—ฑ๐˜‚๐˜€๐˜๐—ฟ๐˜† ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ โœ… SaaS Platforms โœ… eCommerce Systems โœ… Healthcare Applications โœ… Real Estate Software โœ… Media & Entertainment Apps โžค ๐——๐—ผ๐—บ๐—ฎ๐—ถ๐—ป ๐—ž๐—ป๐—ผ๐˜„๐—น๐—ฒ๐—ฑ๐—ด๐—ฒ โœ… Web Applications โœ… Mobile Apps (iOS / Android) โœ… Enterprise SaaS โœ… AI & CX Platforms โœ… Cloud-Based Systems โžค ๐—ง๐—ผ๐—ผ๐—น๐˜€ โœ… Cypress โœ… Appium โœ… Selenium โœ… Postman โœ… JMeter โœ… JIRA โœ… ClickUp โœ… Trello โœ… BrowserStack โœ… Sauce Labs โžค ๐—ช๐—ต๐˜† ๐—–๐—น๐—ถ๐—ฒ๐—ป๐˜๐˜€ ๐—›๐—ถ๐—ฟ๐—ฒ ๐— ๐—ฒ โœ… Fast Communication โœ… Honest QA Feedback โœ… Easy-to-Understand Bug Reports โœ… Strong Attention to Detail โœ… On-Time Delivery ๐Ÿ‘‰ Message me now and get a FREE test sample or QA plan for your project. ๐Ÿ‘‰ Letโ€™s make your product bug-free before launch ๐Ÿš€ ๐Ÿ”‘ ๐—ž๐—ฒ๐˜†๐˜„๐—ผ๐—ฟ๐—ฑ๐˜€ QA Tester, Software QA, Manual Testing, Automation Testing, Cypress, Appium, Selenium, API Testing, Postman, Mobile App Testing, iOS Testing, Android Testing, Web Testing, Regression Testing, Functional Testing, Bug Reporting, Test Cases, SaaS QA, Agile QA, JIRA, ClickUp, Performance Testing, JMeter, Cross Browser Testing, UAT Testing, Black Box Testing, Quality Assurance Engineer, Software Testing, CI CD QA, Exploratory Testing, Load Testing

  • Web Testing
  • Mobile App Testing
  • Manual Testing
  • End-to-End Testing
  • Software Testing
  • Jira
  • Performance Testing
  • API Testing
  • Bug Tracking & Reports
  • Usability Testing
  • Game Testing
  • Functional Testing
  • User Acceptance Testing
  • Compatibility Testing
  • Test Execution
Amir S.

Lahore, Pakistan

$30/hr
5.0
16 jobs

๐’๐ญ๐ซ๐ฎ๐ ๐ ๐ฅ๐ข๐ง๐  ๐ญ๐จ ๐’๐œ๐š๐ฅ๐ž ๐˜๐จ๐ฎ๐ซ ๐’๐š๐š๐’, ๐…๐ข๐ฑ ๐š ๐๐ซ๐จ๐ค๐ž๐ง ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ, ๐จ๐ซ ๐๐ฎ๐ข๐ฅ๐ ๐’๐จ๐ฆ๐ž๐ญ๐ก๐ข๐ง๐  ๐“๐ก๐š๐ญ ๐€๐œ๐ญ๐ฎ๐š๐ฅ๐ฅ๐ฒ ๐–๐จ๐ซ๐ค๐ฌ ๐ข๐ง ๐๐ซ๐จ๐๐ฎ๐œ๐ญ๐ข๐จ๐ง? You've got an idea or maybe even a product โ€” but things are slow, messy, or not scaling the way they should. Thatโ€™s where I come in. I help businesses build and fix real-world systems โ€” especially in Healthcare, Robotics, and SaaS platforms โ€” where performance, reliability, and scalability actually matter. I donโ€™t just write code. I become your external tech partner โ€” someone you can rely on long-term. ๐–๐ก๐š๐ญ ๐˜๐จ๐ฎ ๐†๐ž๐ญ โœ… MVPs built properly โ€” ready to scale, not throwaway code โœ… Fix & rebuild of systems after failed developers โœ… 6+ years of long-term client relationships โœ… Clean, maintainable architecture (.NET + Angular) โœ… Real-time systems (robotics, GPS tracking, dashboards) โœ… Secure systems (HIPAA-ready, enterprise-level practices) ๐–๐ก๐š๐ญ ๐’๐ž๐ญ๐ฌ ๐Œ๐ž ๐€๐ฉ๐š๐ซ๐ญ Over the years, Iโ€™ve worked on systems that go beyond typical web apps. Iโ€™ve built and optimized: ๐Ÿฅ Healthcare platforms (EMR/EHR, telehealth, patient workflows) ๐Ÿค– Robotics & IoT systems (Keenon, Gausium, fleet tracking) ๐Ÿ“Š Real-time dashboards & monitoring systems ๐Ÿงฉ Multi-tenant SaaS platforms Iโ€™ve also helped clients: โœ… Recover from broken or incomplete projects โœ… Improve performance of slow systems โœ… Design scalable backend architecture โœ… Integrate complex third-party APIs My focus is always the same: ๐Ÿ‘‰ Build something stable, scalable, and easy to maintain ๐€๐ˆ, ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง & ๐’๐ฆ๐š๐ซ๐ญ ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ๐ฌ I also help integrate AI where it actually makes sense: ChatGPT / OpenAI integrations AI-powered dashboards & analytics Smart assistants for healthcare & operations Workflow automation Data-driven insights Not hype โ€” practical AI that improves your product. ๐Š๐ž๐ฒ ๐’๐ค๐ข๐ฅ๐ฅ๐ฌ & ๐“๐ž๐œ๐ก ๐…๐ซ๐จ๐ง๐ญ๐ž๐ง๐: Angular, TypeScript, DevExtreme ๐๐š๐œ๐ค๐ž๐ง๐: .NET Core / .NET 6โ€“9, ASP.NET Web API, C# ๐€๐ซ๐œ๐ก๐ข๐ญ๐ž๐œ๐ญ๐ฎ๐ซ๐ž: Clean Architecture, Scalable SaaS, Multi-tenant systems ๐ƒ๐š๐ญ๐š๐›๐š๐ฌ๐ž: SQL Server, EF Core, Dapper ๐‚๐ฅ๐จ๐ฎ๐ & ๐ƒ๐ž๐ฏ๐Ž๐ฉ๐ฌ: Azure, CI/CD, Docker ๐ˆ๐ง๐ญ๐ž๐ ๐ซ๐š๐ญ๐ข๐จ๐ง๐ฌ: Robotics APIs, Geotab, OAuth, Payment systems ๐€๐ˆ: OpenAI, ChatGPT, intelligent automation ๐–๐ก๐š๐ญ ๐ˆ๐ญโ€™๐ฌ ๐‹๐ข๐ค๐ž ๐–๐จ๐ซ๐ค๐ข๐ง๐  ๐–๐ข๐ญ๐ก ๐Œ๐ž โœ… Clear communication โ€” no confusion, no disappearing โœ… Focus on real problems, not just code โœ… Clean and maintainable solutions โœ… Long-term mindset โ€” not quick fixes ๐ˆ๐Ÿ ๐˜๐จ๐ฎโ€™๐ซ๐ž ๐’๐ž๐ซ๐ข๐จ๐ฎ๐ฌ ๐€๐›๐จ๐ฎ๐ญ ๐๐ฎ๐ข๐ฅ๐๐ข๐ง๐  ๐ˆ๐ญ ๐‘๐ข๐ ๐ก๐ญ Whether you're: Building a SaaS Scaling a healthcare platform Working with robotics / IoT Fixing a system thatโ€™s not working ๐Ÿ‘‰ I can help you move forward the right way. ๐Œ๐ž๐ฌ๐ฌ๐š๐ ๐ž ๐ฆ๐ž โ€” ๐ฅ๐ž๐ญโ€™๐ฌ ๐๐ข๐ฌ๐œ๐ฎ๐ฌ๐ฌ ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ซ๐จ๐ฃ๐ž๐œ๐ญ.

  • DevExpress
  • ASP.NET Core
  • Microsoft SQL Server
  • Azure DevOps
  • Telemedicine
  • Angular
  • DevExpress Reporting
  • Microsoft Azure
  • Telerik
  • Health & Fitness
  • Fleet Management
  • Video Editing
  • Automotive
  • Blazor
  • Syncfusion
Shital K.

London, United Kingdom

$40/hr
5.0
3 jobs

As a .NET developer, I am a skilled software developer who specializes in creating applications using the Microsoft .NET Core. I have a strong understanding of programming concepts and are proficient in languages like C#. My primary role is to design, develop, and maintain applications using the .NET framework. This involves working with various tools and technologies to build desktop, web that run on Windows operating systems and other platforms. I am also adept at working with different software development methodologies such as Agile or Scrum and are able to work collaboratively with other team members, including project managers, designers, and other developers. ๐Ÿ”ฅ What I specialize in: C# / VB.NET Desktop Application Development (WinForms, DevExpress) SQL Server performance tuning & query optimization ERP & Accounting Systems (Inventory, GST, Reporting) QuickBooks Desktop Integration (QB SDK, automation, sync) Fixing slow applications caused by database or code issues Excel/VBA โ†’ .NET Application or DLL Conversion API integrations & system synchronization Auto-updaters (Application + Database migration) Industrial systems (Serial Port, Bluetooth, real-time control) ๐Ÿ’ก Proven real-world experience: โœ” Inventory & Billing Systems with DevExpress โœ” Custom CRM & HRM Solutions (Multi-User) โœ” Financial Dashboards with Real-Time Charts โœ” Booking & Scheduling Tools with Reminders โœ” Secure Login & Licensing Applications โœ” ERP system for diamond industry (high-volume transactions) โœ” Optimized SQL performance for business-critical systems โœ” QuickBooks automated order & invoice sync โœ” Bulk email automation system (Google API integration) โœ” Excel VBA converted to scalable VB.NET DLL โœ” API-based auto-update system with database upgrades โœ… Technical Expertise โœ” Languages & Frameworks: C#.NET, VB.NET, WinForms, Desktop Application, .NET Framework, .NET Core โœ” UI Frameworks: DevExpress, Custom Controls โœ” Backend Logic: Complex Business Rules, Data Processing, API Integrations โœ” Databases: SQL Server (Advanced) - [Stored Procedures, Functions, Triggers, Query Optimization, Performance Tuning, Indexing & Execution Plans], Oracle Database, MS Access, Database Design & Architecture, Data Migration & Integration โœ” Extras: Reporting, Printing, Multi-language Apps, Licensing Systems, Crystal Reports / RDLC Reporting, Git Version Control โšก Why clients hire me: โœ” 14+ years of strong industry experience โœ” Expert in C#, .NET, and enterprise application development โœ” Strong database optimization and performance tuning skills โœ” Experience in SQL Server, Oracle, and MS Access โœ” Strong experience with real-world business systems (ERP) โœ” I quickly identify performance bottlenecks and fix them โœ” Focus on speed, stability, and long-term scalability

  • DevExpress
  • C#
  • VB.NET
  • Microsoft SQL Server
  • SAP Crystal Reports
  • Microsoft SQL Server Reporting Services
  • DevExpress Reporting
  • Database Management
  • Database
  • Oracle
  • Web API
  • Bot
  • Microsoft Access
  • DevOps
Leon H.

San Diego, California

$85/hr
4.8
168 jobs

25+ years in Software Development Available for 40-60 hrs./wk. Excellent references from CEOs of the companies. Bringing products to market: inception, spec, architecture, implementation, testing. Seeking for software development projects in the following areas on Windows Platforms: - Recent successful GPT-3/3.5/4 API experience with C#, DALL-E interface, and OpenAI Whisper. - Experience of developing RAG Web Service enabling chatting with private corpus of documents, based on Azure Cognitive Search SDK, Azure OpenAI API and Azure Cosmos Vector DB for vector, hybrid, and semantic search. Segmenting Word/PDF/Excel/CSV/Text documents, embeddings, and ingestion. - Worked with ML.NET in VSTO Outlook Add-In environment for email classification. - Experience with Text-To-Speech and Speech-To-Text using AWS, Azure, Google, Eleven Labs, and other vendors. Experience with Google Voice Services, including Diarization (recognition of different speakers and designation in the transcript), and Medical Transcription. Able to produce STS (Speech-to-Speech) application - interacting with ChatGPT over microphone and speakers. Recent Development Experience of TTS with OpenAI. - AI Training of basic GPT models using fine-tuning, and embedding techniques with vector databases, such as Pinecone, Qdrant, and Milvus APIs. - OpenAI Completion and Embeddings API, GPT-3/3.5/4, Whisper API for Transcribing and Translation - Azure Semantic Kernel, Azure Data Explorer (ADX), Azure Blob Storage, Azure Analytical Services. - AWS Text-To-Speech, AWS Storage - Web Services: REST-API, ASP.NET Framework and Core, WCF Web Services, Microservices - Azure Active Directory Authentication from Desktop Applications in C# - Desktop applications with C#/.NET Framework/.NET Core, WinForms, WPF, DevExpress - Microsoft Office VSTO/COM Add-Ins for Outlook, Excel, Word, and PowerPoint - Client/Server Systems: Sockets and high-level protocols, such as HTTP, FTP, MQTT - Windows Services - Microsoft Dynamics 365 - Hardware Interface: USB/RS232/RS485 Technologies and Frameworks: - Languages: C#, C/C++, Python, MicroPython, XML, JSON - Databases: SQL, SQLite, MySQL, Entity Framework 6/Core and LINQ. - Networking: Sockets (.NET and Winsock), REST API, WCF, HTTP, FTP, MQTT, packet-level TCP/IP, - Serial (RS232/RS485), MODBUS. - IDE: Visual Studio 2010 through 2022 - Office Add-Ins: VSTO Add-ins for Outlook, Excel, Word, PowerPoint. Add-In Express Framework. - VOIP: PJ SIP Stack with DBUS, Asterisk, Open Phone Abstract Library (OPAL) - Active Directory/LDAP/ADSI - Monte Carlo Simulations in C# - Linux: C/C++ and Python with MQTT Development on Ubuntu and Raspbian. - AES256 Encryption, Monte-Carlo Simulations, SHA256, PGP/GnuPG PKI (Public Key Infrastructure) Application binaries signing (Authenticode), Security Certificate generation in code based on CA. - Installers with Advanced Installer, Deployment strategies. - Product Licensing

  • DevExpress
  • Windows Forms
  • C++
  • C#
  • Microsoft Visual Studio
  • C
  • XML
  • JSON
  • Web Service
  • Microsoft Outlook
  • Winsock
  • TCP/IP
  • Microsoft Excel
  • Plugin Development
  • Quantitative Analysis
Afzaal A.

Changa Manga, Pakistan

$15/hr
5.0
6 jobs

If your .NET system is slow, unstable, hard to maintain, or blocking business growth - I fix that. I help businesses rescue, modernize, and scale legacy .NET applications without disrupting ongoing operations. Letโ€™s discuss your project today โ€” Iโ€™ll review your current setup free of cost and suggest a practical, scalable plan before we even start. Most of my clients reach out when: - Their legacy system is crashing, slow, or insecure - Developers left and nobody understands the code - Compliance audits (HIPAA / PCI-DSS) are failing - The system canโ€™t scale with users or business demand - They want to modernize without a risky full rewrite With 8+ years of experience, Iโ€™ve helped companies in Healthcare, FinTech, ERP, POS, and HRMS turn fragile legacy systems into secure, cloud-ready platforms used by thousands of users daily. โœ… What I Can Do for You - Stabilize and refactor legacy .NET / ASP .NET applications - Modernize WebForms or MVC apps into clean, scalable architectures - Migrate systems to .NET Core / .NET 6โ€“8 and Azure - Fix performance bottlenecks and security vulnerabilities - Design compliance-ready systems (HIPAA, PCI-DSS, HL7/FHIR) - Build new systems the right way using Clean Architecture I have worked on various projects for clients across different industries and sectors, delivering solutions that meet their needs and expectations. I have a strong knowledge of Sitecore architecture, features, modules, tools, and APIs, as well as other web development technologies such as .NET (MVC),.Net Core, C#, HTML, CSS,bootstrap,DevExpress,Angular,Jquery, JavaScript, SQL Server, React, Next.js, etc. Why work with me? ๐Ÿ’•Reliable & Accountable -- Consistently deliver on commitments, meet deadlines, and maintain a high standard of work. ๐Ÿ’•Strong Technical Breadth & Depth -- Experienced with modern frameworks (React/Next.js, Node.js/.NET), scalable APIs, and both SQL/NoSQL databases. ๐Ÿ’•Clean, Maintainable Code -- Focus on clarity, modular structure, and long-term maintainability. ๐Ÿ’•Problem-Solving Mindset -- Able to diagnose issues quickly and implement efficient, effective solutions. ๐Ÿ’•Collaborative & Communicative -- Work effectively with cross-functional teams and communicate clearly with technical and non-technical stakeholders. ๐Ÿ’•Fast Learner & Adaptable -- Stay current with new technologies and best practices to keep systems modern. #DotNet #SeniorDeveloper #ASPNetMVC #AngularJS #EntityFramework #SQL #MySQL #API #ArtificialIntelligence #WindowsForms #DevExpress #SSRS #SAPCrystalReports #GitScrum #Jira #Trello #AndroidThings #iOS #WebDevelopment #DesktopApplications #FullStackDeveloper

  • DevExpress
  • SQL
  • MySQL
  • Desktop Application
  • ASP.NET MVC
  • Web Development
  • AngularJS
  • Entity Framework
  • API Development
  • Artificial Intelligence
  • Jira
  • Trello
  • Windows Forms
  • SQL Server Reporting Services
  • SAP Crystal Reports
  • GitScrum
  • Android Things
  • iOS

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At A Glance: DevExpress

The world we live in is constantly producing computer software and programs that are input-intensive. As the development of software becomes increasingly complex, so does the desire for simpler and more visually interactive software interfaces. DevExpress is a company founded in 1998 that offers a variety of software for UI control. UI controls are graphical interfaces, such as buttons, scroll bars, or other graphical elements, that a user can interact with directly to input parameters into the software. DevExpress offers programs that focus on products and users of the Delphi/C++ programming languages. A DevExpress specialist is the ideal solution to implementing UI controls in any project.

A DevExpress specialist is a professional who is fluent in all DevExpress projects and can help you or your business implement widgets or UI controls into a variety of software and projects. A DevExpress expert is generally well-versed in the software or framework he or she is working with or modifying, including programming protocols such as .NET, Microsoft Silverlight, and many others. In addition to various software and computer skills, DevExpress professionals possess a general knowledge and experience in GUI design as well. The variety of projects that the DevExpress software intersects with gives those users who are familiar with their products a unique set of experiences that can help them brainstorm innovative solutions to a wide set of problems. The dynamic skill set a DevExpress specialist brings to the table can be a valuable addition to any businessโ€™ or organizationโ€™s project.